Remove `devtoolsLogs` and `traces` compat artifacts

[adamraine]

Carry-over from https://github.com/GoogleChrome/lighthouse/issues/15060 Initial pass: https://github.com/GoogleChrome/lighthouse/pull/15276

We are keeping these compat artifacts for 11.0 at least. We can potentially drop them in 12.0.

Non-breaking:

• [ ] Remove all our usages of artifacts.devtoolsLogs and artifacts.traces
• [x] ~Ensure downstream users (e.g. pubads) remove usages of artifacts.devtoolsLogs and artifacts.traces~
• [x] Update docs to reference new artifacts

Breaking:

• [x] Handle the error trace/dtlog differently
• [ ] Remove defaultPass prefix from saved artifacts (i.e. defaultPass.trace.json -> trace.json)
• [ ] Remove the compat artifacts devtools-log-compat and trace-compat

[connorjclark]

FYI #15843

[benschwarz]

Am I correct in assuming that "compat artifacts" refers to the old API (which was kept for compatibility reasons), and artifacts.DevtoolsLog && artifacts.Trace will remain in place?

[adamraine]

Am I correct in assuming that "compat artifacts" refers to the old API (which was kept for compatibility reasons), and artifacts.DevtoolsLog && artifacts.Trace will remain in place?

Yes